CVE-2021-20787

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CVSS 3.1

4.8 medium

EPSS

<1%p49

Published

Jul 30, 2021 (Jul 30, 2021)

Modified

Jun 17, 2026

Description

Cross-site scripting vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote attacker to inject an arbitrary script by sending a specially crafted request to a specific URL.

Vendors: groupsession
Products: groupsession, groupsession bycloud, groupsession zion
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.6%)

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